Tube cap



FIG. 1 is a perspective view of a tube cap, showing our design;

FIG. 2 is a top-plan view of the tube cap of FIG. 1;

FIG. 3 is a front elevational view of the tube cap of FIG. 1, the rear elevational view being a mirror image thereof;

FIG. 4 is a right-side elevational view of the tube cap of FIG. 1;

FIG. 5 is a left-side elevational view of the tube cap of FIG. 1; and,

FIG. 6 is a bottom-plan view of the tube cap of FIG. 1.

The broken line showing of interior elements shown in FIGS. 1,2, and 6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a tube cap, as shown and described. 